Pulley slip diagnosis method, device, vehicle and storage medium

Abstract

The present invention belongs to the field of vehicle technology, and discloses a pulley slippage diagnosis method, device, vehicle and storage medium. The pulley slippage diagnosis method includes starting the engine, obtaining a standard slippage value before wading, and entering a wading control mode. The wading control mode includes: a siphon tube is connected to a water tank, the siphon tube automatically absorbs water from the water tank and sprays it to the pulley, obtaining a current slippage value after wading, determining that the current slippage value after wading is not equal to the standard slippage value before wading, and judging that the pulley is in a slippage state. The method is used to eliminate potential engine failures and solve the problem that the pulley and belt after wading are frost-coated due to extremely low temperatures in northern winter. The method can diagnose whether the pulley is slipping in outdoor venues in winter.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a pulley slip diagnosis method, device, vehicle and storage medium. Background Art

[0002] After vehicle development is complete, complete vehicle testing is required to detect problems with components such as the engine, body, and electrical systems. This allows for targeted debugging and improvements to ensure the vehicle's performance meets requirements. During engine operation, the crankshaft can be subject to load and environmental fluctuations, causing slippage between the crankshaft pulley and belt, resulting in abnormal engine noise or even engine shutdown.

[0003] To address this issue, the traditional method involves subjecting the vehicle to an outdoor water test after the engine is assembled. The vehicle is driven through a flooded area, soaking the pulley and belt in water. The engine is then run to determine whether slippage will occur between the pulley and belt. However, in outdoor testing sites in northern China, the extremely low winter temperatures can cause frost to form on the wet pulleys and belts, affecting the diagnostic accuracy of pulley slippage.

[0004] Therefore, there is an urgent need for a pulley slip diagnosis method, device, vehicle and storage medium to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, a pulley slippage diagnosis method is provided to solve the problem in the prior art that the extremely low temperature in the north in winter causes frost on the pulley and belt after wading through water, making it impossible to diagnose whether the pulley is slipping.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A pulley slip diagnosis method comprising:

[0008] Start the engine;

[0009] Obtain the standard value of slip before wading;

[0010] Entering a wading control mode, the wading control mode includes: a siphon pipe is connected to the water tank, the siphon pipe automatically draws water from the water tank and sprays it toward the pulley;

[0011] Get the current value of slip after wading;

[0012] It is determined that the current slip value after wading is not equal to the standard slip value before wading.

[0013] Preferably, obtaining the skid standard value before wading includes:

[0014] Get the speed of the air conditioner;

[0015] Get the rotation speed of the pulley before wading;

[0016] A first speed ratio is calculated, where the first speed ratio is obtained by a ratio of a speed of the front wading pulley to a speed of the air conditioner.

[0017] Preferably, obtaining the current value of slip after wading includes:

[0018] Get the rotation speed of the pulley after wading;

[0019] A second speed ratio is calculated, where the second speed ratio is obtained by a ratio of a speed of the rear wading pulley to a speed of the air conditioner.

[0020] Preferably, if the current value of slip after wading is equal to the standard value of slip before wading;

[0021] Then return to the wading control mode.

[0022] Preferably, the method further includes, after determining that the current slip value after wading is not equal to the standard slip value before wading:

[0023] Entering a pulley slip elimination mode, the pulley slip elimination mode comprising: changing the torque of the generator;

[0024] Re-obtain the standard value of skidding before wading;

[0025] Based on the wading control mode, the current slip value after wading is re-obtained;

[0026] Compare the current skidding value after wading with the standard skidding value before wading;

[0027] If the current value of skidding after wading is equal to the standard value of skidding before wading;

[0028] End the wading test mode.

[0029] Preferably, if the current value of the slip after wading is not equal to the standard value of the slip before wading;

[0030] Then re-enter the pulley slip elimination mode.

[0031] According to another aspect of the present invention, there is provided a pulley slippage diagnosis device, comprising:

[0032] Engine control module, used to start the engine;

[0033] A skidding standard value acquisition module is used to obtain the skidding standard value before wading;

[0034] A wading control module, used to control the pulley to enter a wading control mode;

[0035] The current slip value acquisition module is used to obtain the current slip value after wading;

[0036] The skidding determination module is used to determine whether the current skidding value after wading is not equal to the standard skidding value before wading.

[0037] Preferably, the current slip value acquisition module is specifically used to input the rotational speed of the pulley after wading and the rotational speed of the air conditioner into a speed ratio model, and the speed ratio model outputs the current slip value.

[0038] According to yet another aspect of the present invention, a vehicle is provided, comprising an engine train and a siphon provided in the engine train, further comprising:

[0039] ECU;

[0040] a first sensor, configured to detect a rotation speed of the air conditioner and send the detected rotation speed of the air conditioner to the ECU;

[0041] a second sensor, configured to detect a rotational speed of the pulley and send the detected rotational speed of the pulley to the ECU;

[0042] a memory for storing one or more programs;

[0043] When one or more of the programs are executed by the ECU, the ECU controls the vehicle to implement the above-mentioned pulley slip diagnosis method.

[0044] According to another aspect of the present invention, a storage medium is provided, on which a computer program is stored. When the computer program is executed by an ECU, the pulley slip diagnosis method described above is implemented.

[0045] The beneficial effects of the present invention are:

[0046] The present invention provides a pulley slippage diagnosis method, device, vehicle and storage medium. The pulley slippage diagnosis method starts the engine, obtains the slippage standard value before wading, and enters the wading control mode. The wading control mode includes: a siphon tube is connected to a water tank, the siphon tube automatically absorbs water from the water tank and sprays it to the pulley, obtains the current slippage value after wading, determines that the current slippage value after wading is not equal to the slippage standard value before wading, and judges that the pulley is in a slippage state. It is used to eliminate potential engine failures and solve the problem that the pulley and belt after wading due to extremely low temperatures in northern winters are frost-coated. It can diagnose whether the pulley is slipping in outdoor venues in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The process of the pulley slip diagnosis method in the embodiment of the present invention is as follows Figure 1 ;

[0048] Figure 2 The process of the pulley slip diagnosis method in the embodiment of the present invention is as follows Figure 2 ;

[0049] Figure 3 Schematic diagram of the structure of a pulley slippage diagnosis device according to an embodiment of the present invention;

[0050] Figure 4 Schematic diagram of the structure of a vehicle in an embodiment of the present invention.

[0051] Reference numerals:

[0052] 300, engine control module; 310, slip standard value acquisition module; 320, wading control module; 330, slip current value acquisition module; 340, slip determination module;

[0053] 400 , ECU; 410 , engine gear train; 420 , siphon; 430 , first sensor; 440 , second sensor; 450 , memory. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0055] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0056] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0057] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0058] Example 1

[0059] After the engine is assembled on the vehicle, the vehicle needs to be subjected to an outdoor water wading test. The vehicle is driven through a flooded area to wet the pulley and belt, and then the engine is run to determine whether the pulley and belt will slip when the vehicle is in the water. However, in outdoor test sites in the north, due to the extremely low temperature in winter, the wet pulleys and belts condense into frost, which affects the diagnosis of whether the belt is slipping. In this regard, the present embodiment provides a pulley slippage diagnosis method that can be used in the field of vehicle technology. The pulley slippage diagnosis method is executed by a pulley slippage diagnosis device. Specifically, as shown in FIG. Figure 1-Figure 4 As shown, the pulley slip diagnosis method includes the following steps.

[0060] S100: Start the engine.

[0061] Turn on the key switch, the engine ignites and starts, the engine provides power to the car, and the tester drives the car on the test road.

[0062] S110: Obtaining a standard value of slippage before wading.

[0063] Specifically, S110 includes steps S1101-S1103.

[0064] S1101: Obtain the rotation speed of the air conditioner.

[0065] The first sensor is installed on the air-conditioning compressor pulley. The air-conditioning rotation speed is accurately measured by the first sensor and transmitted to the slip standard value acquisition module.

[0066] S1102: Obtain the rotation speed of the pulley before wading.

[0067] The second sensor is installed on the pulley of the engine crankshaft by modifying the trial-produced code disc. The code disc rotates synchronously with the crankshaft pulley. By installing the second sensor on the code disc, the real-time speed of the pulley can be accurately measured and transmitted to the slip standard value acquisition module. The second sensor is a speed encoder.

[0068] S1103: Calculate a first speed ratio, where the first speed ratio is obtained by the ratio of the speed of the pulley before wading to the speed of the air conditioner.

[0069] S120: Entering a wading control mode, the wading control mode includes: a siphon tube is connected to the water tank, and the siphon tube automatically absorbs water from the water tank and sprays it toward the pulley.

[0070] The water inlet of the siphon tube is installed in the external water tank, and the water outlet of the siphon tube is facing the meshing position of the pulley and the belt. When the engine is started for a period of time, water is filled in the water tank and the pulley rotates at high speed. According to Bernoulli's principle, the pressure of the fluid is affected by the flow rate. The greater the gas flow rate along the circumferential direction of the pulley, the smaller the pressure. That is, the water outlet pressure of the siphon tube close to the pulley is small, and the water inlet pressure of the siphon tube is large, so that the siphon tube automatically draws water from the water tank and continuously sprays it on the meshing position of the pulley and the belt, so that the pulley and belt continue to maintain a wading state.

[0071] S130: Obtaining the current value of slip after wading.

[0072] Specifically, S130 includes steps S1301-S1302.

[0073] S1301: Obtain the rotation speed of the pulley after wading.

[0074] The second sensor can accurately measure the rotation speed of the pulley after wading and transmit it to the current slip value acquisition module.

[0075] S1302: Calculate a second speed ratio, where the second speed ratio is obtained by the ratio of the speed of the pulley after wading to the speed of the air conditioner.

[0076] S140: Determine whether the current slip value after wading is equal to the standard slip value before wading.

[0077] The current slip value after wading is the speed ratio of the pulley speed after wading to the speed of the air conditioner. The standard slip value before wading is the speed ratio of the pulley speed before wading to the speed of the air conditioner. The slip determination module determines that the current slip value after wading is not equal to the standard slip value before wading, which means that the pulley is in a slipping state.

[0078] The pulley slippage diagnosis method provided in this embodiment starts the engine, obtains the slippage standard value before wading, and enters the wading control mode. The wading control mode includes: a siphon tube is connected to a water tank, the siphon tube automatically absorbs water from the water tank and sprays it onto the pulley, obtains the current slippage value after wading, determines that the current slippage value after wading is not equal to the slippage standard value before wading, and judges that the pulley is in a slippage state. It is used to eliminate potential engine failures and solve the problem that the pulley and belt after wading due to extremely low temperatures in northern winters condense into frost. It can diagnose whether the pulley is slipping in outdoor venues in winter.

[0079] Example 2

[0080] like Figure 2 As shown, this embodiment provides a pulley slippage diagnosis method, which is specific based on the above-mentioned embodiment 1. The pulley slippage diagnosis method includes the following steps.

[0081] S200: Start the engine.

[0082] S210: Obtaining a standard value of slippage before wading.

[0083] The skid standard value before wading is obtained through the skid standard value acquisition module.

[0084] S220: Entering wading control mode.

[0085] S230: Compare the slip standard value and the slip current value.

[0086] If the slip standard value before wading is equal to the current slip value after wading, it is determined that the pulley is not slipping, then return to S220 and repeat the steps of S220; if the slip standard value before wading is not equal to the current slip value after wading, then execute S240.

[0087] S240: Entering the pulley slip elimination mode, the pulley slip elimination mode includes: changing the torque of the generator.

[0088] When the slippage standard value before wading is not equal to the slippage current value after wading, it means that the pulley is in a slipping state after wading. If no measures are taken to eliminate the slippage, it is very likely that the belt will separate from the pulley within a certain period of time and fail, and further lead to test failure.

[0089] The pulley slip elimination mode includes changing the torque of the generator, based on the pulley being in a slip state, changing the negative torque of the generator to positive torque, or changing the positive torque of the generator to negative torque, so that the pulley eliminates the slip state.

[0090] S250: Re-obtain the standard value of skidding before wading.

[0091] S260: Based on the wading control mode, re-obtain the current slip value after wading.

[0092] S270: Compare the slip standard value and the slip current value.

[0093] If the standard value of slip before wading is not equal to the current value of slip after wading, return to S240 and repeat steps S240-S260; if the standard value of slip before wading is equal to the current value of slip after wading, execute S280.

[0094] S280: End the wading test mode.

[0095] Ending the wading test mode means that the engine is stopped and the siphon tube no longer sprays water toward the meshing position of the pulley and the belt, thereby completing the diagnosis of whether the pulley is slipping.

[0096] The pulley slippage diagnosis method provided in this embodiment is based on the above-mentioned embodiment 1. The method starts the engine, obtains the slippage standard value before wading, and enters the wading control mode. If the pulley slips, the pulley slippage elimination mode is entered, the torque of the generator is changed, and the slippage standard value before wading is re-obtained. Based on the wading control mode, the current slippage value after wading is re-obtained, and the size of the current slippage value after wading and the slippage standard value before wading is determined to determine whether the pulley slips. If it slips, the wading test mode is terminated. The implementation of the above-mentioned pulley slippage diagnosis method can diagnose whether the pulley is slipping in outdoor venues in winter.

[0097] Example 3

[0098] This embodiment provides a pulley slippage diagnostic device, which can execute the pulley slippage diagnostic method described in the above embodiment.

[0099] Specifically, if Figure 3 As shown, the pulley slip diagnostic device includes an engine control module 300 , a slip standard value acquisition module 310 , a wading control module 320 , a slip current value acquisition module 330 and a slip determination module 340 .

[0100] Among them, the engine control module 300 is used to start the engine; the slip standard value acquisition module 310 is used to obtain the slip standard value before wading; the wading control module 320 is used to control the pulley to enter the wading control mode; the slip current value acquisition module 330 is used to obtain the slip current value after wading; the slip determination module 340 is used to determine that the slip current value after wading is not equal to the slip standard value before wading.

[0101] The pulley slip diagnostic device provided in this embodiment starts the engine through the engine control module 300; obtains the slip standard value before wading through the slip standard value acquisition module 310; controls the pulley to enter the wading control mode through the wading control module 320; obtains the slip current value after wading through the slip current value acquisition module 330; and determines through the slip determination module 340 that the slip current value after wading is not equal to the slip standard value before wading, thereby judging that the pulley is in a slipping state, which is used to eliminate potential engine faults.

[0102] The pulley slippage diagnosis device provided in the third embodiment of the present invention can be used to execute the pulley slippage diagnosis method provided in the above embodiments, and has corresponding functions and beneficial effects.

[0103] Example 4

[0104] This embodiment provides a vehicle, such as Figure 4 As shown, the vehicle includes an engine train 410, a siphon 420, an ECU 400, a first sensor 430, a second sensor 440, and a memory 450. The engine train 410, the siphon 420, the ECU 400, the first sensor 430, the second sensor 440, and the memory 450 may be connected via a bus or other means.

[0105] Specifically, the siphon tube 420 is arranged in the engine gear train 410, the first sensor 430 is used to detect the rotation speed of the air conditioner and send the detected rotation speed of the air conditioner to the ECU 400; the second sensor 440 is used to detect the rotation speed of the pulley and send the detected rotation speed of the pulley to the ECU 400.

[0106] Memory 450, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the pulley slip diagnosis method in the embodiments of the present invention. ECU 400 executes the software programs, instructions, and modules stored in memory 450 to perform various vehicle functions and data processing, thereby implementing the pulley slip diagnosis method in the embodiments described above.

[0107] Memory 450 primarily includes a program storage area and a data storage area. The program storage area can store an operating system and applications required for at least one function; the data storage area can store data generated based on the terminal's usage. Furthermore, memory 450 can include high-speed random access memory 450 and non-volatile memory 450, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some instances, memory 450 may further include memory 450 located remotely from ECU 400. These remote memories 450 can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0108] The vehicle provided in the fourth embodiment of the present invention and the pulley slip diagnosis method provided in the above embodiment belong to the same inventive concept. The technical details not described in detail in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as executing the pulley slip diagnosis method.

[0109] Example 5

[0110] This embodiment further provides a storage medium on which a computer program is stored. When the computer program is executed by the ECU, the pulley slip diagnosis method according to the embodiment of the present invention is implemented.

[0111] Of course, the storage medium containing computer-executable instructions provided in an embodiment of the present invention, whose computer-executable instructions are not limited to the operations in the pulley slip diagnosis method described above, can also execute related operations in the pulley slip diagnosis method provided in an embodiment of the present invention, and have corresponding functions and beneficial effects.

[0112] Through the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented with the help of software and necessary general-purpose hardware, and of course it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for enabling a computer device (which can be a robot, a personal computer, a server, or a network device, etc.) to execute the pulley slip diagnosis method described in each embodiment of the present invention.

[0113] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A pulley slip diagnosis method, characterized in that: include: Start the engine; Obtain the standard value of slip before wading; Entering a wading control mode, the wading control mode includes: a siphon pipe is connected to the water tank, the siphon pipe automatically draws water from the water tank and sprays it toward the pulley; Get the current value of slip after wading; determining that the current skid value after wading is not equal to the standard skid value before wading; Obtaining the standard value of slippage before wading includes: Get the speed of the air conditioner; Get the rotation speed of the pulley before wading; calculating a first speed ratio, where the first speed ratio is obtained by a ratio of a speed of the front wading pulley to a speed of the air conditioner; Obtaining the current slippage value after wading includes: Get the rotation speed of the pulley after wading; A second speed ratio is calculated, where the second speed ratio is obtained by a ratio of a speed of the rear wading pulley to a speed of the air conditioner.

2. The pulley slip diagnosis method according to claim 1, characterized in that: If the current skidding value after wading is equal to the standard skidding value before wading; Then return to the wading control mode.

3. The pulley slip diagnosis method according to any one of claims 1-2, characterized in that: The method further includes, after determining that the current slip value after wading is not equal to the standard slip value before wading: Entering a pulley slip elimination mode, the pulley slip elimination mode comprising: changing the torque of the generator; Re-obtain the standard value of skidding before wading; Based on the wading control mode, the current slip value after wading is re-obtained; Compare the current skidding value after wading with the standard skidding value before wading; If the current value of skidding after wading is equal to the standard value of skidding before wading; End the wading test mode.

4. The pulley slip diagnosis method according to claim 3, characterized in that: If the current skidding value after wading is not equal to the standard skidding value before wading; Then re-enter the pulley slip elimination mode.

5. A pulley slip diagnostic device, characterized in that: The pulley slippage diagnostic device is used to implement the pulley slippage diagnostic method according to any one of claims 1 to 4, and the pulley slippage diagnostic device includes: Engine control module, used to start the engine; A skidding standard value acquisition module is used to obtain the skidding standard value before wading; A wading control module, used to control the pulley to enter a wading control mode; The current slip value acquisition module is used to obtain the current slip value after wading; The skidding determination module is used to determine whether the current skidding value after wading is not equal to the standard skidding value before wading.

6. The pulley slippage diagnostic device according to claim 5, characterized in that: The current slip value acquisition module is specifically used to input the rotation speed of the pulley after wading and the rotation speed of the air conditioner into a speed ratio model, and the speed ratio model outputs the current slip value.

7. A vehicle comprising an engine train and a siphon provided on the engine train, characterized in that: Also includes: ECU; a first sensor, configured to detect a rotation speed of the air conditioner and send the detected rotation speed of the air conditioner to the ECU; a second sensor, configured to detect a rotational speed of the pulley and send the detected rotational speed of the pulley to the ECU; a memory for storing one or more programs; When one or more of the programs are executed by the ECU, the ECU controls the vehicle to implement the pulley slip diagnosis method according to any one of claims 1 to 5.

8. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the ECU, the pulley slip diagnosis method according to any one of claims 1 to 5 is implemented.

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